9865715459968 has 64 divisors (see below), whose sum is σ = 19858883263920. Its totient is φ = 4881622036480.

The previous prime is 9865715459953. The next prime is 9865715460049. The reversal of 9865715459968 is 8699545175689.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×9865715459968² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9865715459891 and 9865715459900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12674358 + ... + 13430218.

Almost surely, 2^{9865715459968} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9865715459968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9929441631960).

9865715459968 is an abundant number, since it is smaller than the sum of its proper divisors (9993167803952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9865715459968 is a wasteful number, since it uses less digits than its factorization.

9865715459968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756935 (or 756923 counting only the distinct ones).

The product of its digits is 5878656000, while the sum is 82.

The spelling of 9865715459968 in words is "nine trillion, eight hundred sixty-five billion, seven hundred fifteen million, four hundred fifty-nine thousand, nine hundred sixty-eight".